Brake rotor



June 24, 1947. J, TARBQX 2,423,056

BRAKE ROTOR Filed March 1, 1945 INVENTOR Patented June 24, 1947 UNITED sra'rss BRAKE ROTOR John P. rel-box, Philadelphia, Pa to The Budd Company, Philadelphia, r... a col-- poration of Pennsyl Application March 1, 1945, Serial No. 580,830

3 Claims. (01. lid-218) The invention relates to a brake rotor of the class having radial braking faces and adapted to.

- be secured to a wheel to rotate therewith.

Such rotors are adapted to cooperate with other brake elements commonly called stators which engage the radial braking faces of the rotor to efi'ect the braking of the wheel with which it is associated.

The invention is an improvement of the class of rotors disclosed and claimed in copending application Serial No. 552,040 filed August 31, 1944, for Brake rotor.

It is a main object of the invention to lighten A the overall construction of such rotors without material sacrifice of strength and to improve the cooling effect of the rotor.-

Other and further obiects and advantages and the manner in which they are attained will become apparent from the following detailed description of the invention when read in connection with the accompanying drawings forming a tion being taken substantially along the line 3-3 of Fig. l.

The rotor according to the invention is preferabiy comprised of but two parts, a support member I and a combined brake and blower member 2. The support member preferably comprises a wrought metal web of tapered form having a radial flange 3 at its inner periphery which is adapted to be bolted through bolts 4 to the hub of a wheel 5 shown mounted on an axle 6. Outwardly of the flange 3 the web is extended in generally axial direction by portion I and its outer peripheral portion 8 is extended generally radially outwardly and provided with spaced proieetions 9. These projections are provided with means for interlocking with the member I, in the form shown such means comprising holes lil through the respective projections.

The combined brake and blower member I is preferably a unitarycasting of a material; such as cast iron, best suited for cooperation with composition lining faced stators.

It comprises circumierentially spaced inner enlargements or bulbous portions i I which are cast 2 directly around the respective spaced projections 9 and through the holes i0 so as to provide a strong interlock therewith both radially and circumferentially.

On opposite sides of the bulbous portions II with their inner margins arranged some distance radially outwardly of them, are arranged two spaced plate-like members I! having the braking faces, to be engaged by the brake stators, formed on their outer sides. These plate-like members are securely braced together by a plurality of closely spaced circumi'erentially and generally radiallyextending braces, certain of these braces as It, every fifth one as shown in Fig. 1, are thicker and stronger than the others, designated l4, and are extended radially inwardly oi the members I! by tapered portions II, Figs. 2 and 3. which terminate in the circumferentially spaced enlargements or bulbous portions il cast onto the support member I. The lighter braces H on the other hand, terminate where they join the plate-like members i2 at their radially inner ends, but have their radially inner margins arched radially outwardly, as indicated at It, Figs. 1 and 3.

It will be seen that this arrangement provides a very light but strong structure, since the outer periphery of the support forms, in effect, a continuous annulus joining together the inner bulbous extremities ll of the cast metal brake and blower member 2.

Also, this arrangement provides very elective cooling means for the brake member, for as shown in Figs. 1 and 3, large openings, as l I, are provided between the outer periphery of the supat the radially inner side of the member equally I from the opposite sides to the centrifugal blower formed by the construction described. This insures not only adequate cooling but also equal cooling of both plate-like members and consequent elimination of strains in the metal due to unequal cooling.

While a specific embodiment of the invention has been herein described in detail, it will be understood that changes and modifications may be made by those skilled in the art without departing from the main featuresof the invention, and

such changes and modifications are intended tobe covered in theappended claims.

What is claimed is:

1. A combined brake rotor and blower oomv prising spaced annular plate members joined together at circumierentially spaced points by generally radially extending braces, at least certain oi! said braces having inward extensions terminating inwardly of the plate members in circumferentially spaced bulbous extremities, all said parts forming an integral casting, and a support member having a peripheral portion having generally radially extending'faces cast into said bulbous extremities.

2. A combined brake rotor and blower comprising spaced annular plate members joined together at circumierentially spaced points by generally radially extending braces, at least certain oi said braces having inward extensions projecting radially inwardly beyond said plate members and terminating in circumferentially spaced enlarged extremities, 'all said parts forming an integral casting, and a support member of web form having its periphery formed with spaced radially outwardly extending projections, said projections being embedded in the respective enlarged extremities of said braces.

3. A combined brake rotor and blower comprising spaced annular plate members joined together at circuniierentially spaced points by generally radially extending braces, at least certain 01. said braces having inward extensions projecting radially inwardly beyond said plate members and terminating in circumierentially spaced extremities disposed, radially a substantial distance inwardly of and axially centrally between, said spaced plate members, and a support member of web form having generally radially extending peripheral portions spaced circumferentially corresponding to the spacing of said extremities and cast into the respective extremities.

JOHN P. 'rannox.

REFERENCES CITED I The following references are of record in the flle of this patent:

UNITED s'ra'rns PATENTS Number Name Date 2,129,199 Dake Sept. 6, 1938 2,215,420 Eksergian Sept. 17, 1940 2,345,016 Tack Mar. 28, 1944 25 2,255,024 Eksergian Sept. 2, 1941 

